Abstract
A quantum close-coupled calculation of the collisional self-broadening of neon lines based on the quantum-mechanical impact theory of Baranger is presented in which the interatomic interaction is represented by adiabatic molecular potentials calculated using model potentials for the electron-atom and atomic core-core interactions. The close-coupled equations are solved using an R-matrix method and results obtained for seven lines involving transitions between the 3s'( 1/2 )0, 3s(3/2)1,2, 3p'( 1/2 )1 and 3p'(3/2)1,2 levels at temperatures of 77 and 273 K. The calculated linewidths agree well with recent measurements, particularly at 273 K, whereas for the shifts the agreement is generally good but there are discrepancies of order 20-30% with experiment for the 3s(3/2)1,2-3p'(3/2)2 and 3s(3/2)1-3p'(3/2)1 transitions.
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